<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-noce指令</title>
    <script src="../js/vue.js"></script>
    <script src="../js/阻止vue在启动时生成生产提示.js"></script>
</head>
<body>
    <div id="root">
        <h2 v-once>初始化的n值是：{{n}}</h2>
        <h2>当前的n值是：{{n}}</h2>
        <button @click="n++">点我n+1</button>
    </div>
    
</body>
<script>
    const vm =new Vue({
        el:'#root',
        data:{
            n:1
        }
    })
</script>
</html>